Enable some RocksDB tests that are enabled on 10.2

FIXME: rocksdb.drop_table hangs on shutdown, but is not disabled in 10.2

storage/rocksdb/mysql-test/rocksdb/t/disabled.def

@@ -85,8 +85,6 @@ rpl_row_triggers : Requires read-free slave.
 
 compact_deletes: MDEV-12663 : rocksdb.compact_deletes times out and causes other tests to fail
 blind_delete_without_tx_api: MDEV-12286: rocksdb.blind_delete_without_tx_api test fails
-unique_check: wrong error number
-autoinc_vars_thread: debug sync point wait timed out
 information_schema: MDEV-14372: unstable testcase
 
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@@ -94,6 +92,4 @@ information_schema: MDEV-14372: unstable testcase
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 mysqlbinlog_gtid_skip_empty_trans_rocksdb : MariaRocks: requires GTIDs
-autoinc_debug: Fails with wrong results
 drop_table: Hangs on shutdown
-allow_to_start_after_corruption : result difference and assertion failure